"silksilksilksilksilk," says Martha. "I can't stress enough how warm [silk] is, even though it is thin. Silk long underwear is the best, and you can wear it under your skinny jeans."

Sure beats bulky long johns, huh?

WinterSilkslong underwear range from lightweight to heavyweight and come in sizes XS (4) to 3X (26-28). They offer both tops and bottoms in several cuts, including low-rise, as well as petite and tall sizes and long underwear for men and children.

Do you have any tips for dressing for cold weather? How do you keep warm and maybe even stylish in the winter months?